Sound-box.



R. HEAD.

SOUND BOX.

APPLICATION FILED AUG.9. 1911.

1,278,341. 0 Patented Sept. 10, 1918 INVENTOR;

HEAD, OF NEW YORK, N. Y., ASSIGNOR TO THE AEQLIAN C1314 CORPORATION OF CONNECTICUT.

SOUND-BOX.

Application filed August 9, 1917. Serial No. 185,318.

To oZZ whom it may concern lie it known that l, ltonnnr Heap, a citizen ot' the l 'nited States, residing at New York. in the county of New York and State oi New York, have invented new an(l usetul improvements in Sounddioxes, of which the following is a specification.

The present invention relates to soundhcxes for phonographs, and more particularly to the vibrating stylus carrying element thereof. It. comprehends certain lna'einaiter-descrihed improvements in the mounting of the atoresaid element, which is connnonlr termed the stylus liar, whereby said har may he readily and quickly applied to a vsounddiort and, in the event of injury, removed therefrom, and whereby, when in place, i will he held against. all rattling, wl l the same time possessing the requifreedom of movement.

According to the invention, the sound-box provided, as usual, with a pair of spaced supporting parts wherein thestylus bar has a rocking mourning; but instead of both of these parts or lugs supporting the bar to an equal extent, as is ordinarily the case, one of them is furnished with a small leaf sgrn'. I which provides the required hearing at that side of the bar, and which presses said har toward the. other lu f. The spring extends over a cut-away portion of its carrier lug. and in that way can be forced back toward the wall of such portion when it becomes necessary to either insert or remove An embodiment of the invention is illustrated in the accompanying drawing, where- 1111- Firrure l is a face view of a sound-box equipped with the improved stvlus bar mounting.

Fig. 2 an edge view thereof.

Fig. 23 is a view similar to Fig. 2, but showing the bar in the act of being attached to the sound-box.

l i r. -t is a sectional view, taken on line of Fig. 1, showing the mounting of the splin Fit. 5 is a view similar to Fig. 2, but show a modification or development of the iricn ion.

Referring more particularly to said drawthe soinnl-hox T, which may he oit any construction, is provided with a of spaced projections or lugs 9 and 9,

these lugs being formed integrally with. or otherwise rigidly connected to, the 1 of the sound-hox at the lower part tlnircot. The aforesaid lugs are utilized to support the stylus bar, and in the more usual construction they are provided with openin to receive theends of a fulcrum nin carried by the bar.

In the present construction. the lugs are made long enough to extend torwar-d across the rim 10 of the SOUi'itl-lHXi. and only one of them is provided with a l.- The latter, whirl is indicated at cated in the inner tare oi the in) the form of a cone-shaped dcpr or A portion of the inner face oi the other th 9 is cut away, thus producing a clearance, Space 12 between the wail of the rntaway partand a small leaf spring ii). the rear end of which latte. fastened h v a rivet. H. orthe like, to the 't'ace of the shoulder 15 formed consequent upon the provision of the said clearance space.

The spring is thus tree to move backward and forward in the,

clearance space to permit manipulation of the stylus bar lti incidental to attzn'lnnenl and removal thereof. as suhsequently ere plained, the outer portion ol the spring heing provided with an opening: 17 which is located directly opposite the seat ll.

The stylus bar 16 is, or may he, in the main of conventional form. and it is fastened at its upper end to the diaphragm is in the usual manner, its lower portion 19 being: enlarged or thickened longitudinall and sncktud at the ternnnal thcreo't to receire tac stylus two lugs or hearing parts 9 and 9 being positioned with that end in VlQW. he engagement of the hearing points 2?; of the pins 22 in their respective seats ll. and. i can readily be ett'ected, because the 13 yields during this operation,

backward into the clearance space 12 so as to permit the centering of the upper point, as shown in Fig. 3.

At the conclusion of the centering operation, the pressure upon the spring is removed, and the latter then acts to hold the stylus bar sufliciently firm to prevent sidewise movement or rattling, while at the same time permitting it to vibrate about its pivot-al axis with the requisite freedom, the connection of the upper end of thebar to the diaphra m being effected subsequently v to its aboveescribed attachment to the supporting lugs, :18 will be understood.

In order to avoid accidental displacement of the stylus bar, due to disengageinentof the spring 13 from the adjacent bearing pin 22, there may be employed a guard which acts to preclude backward movement of 'said spring to an extent sutlicient to )ermit such disengagement. This guard preferably con sists of a small, pin-like member 24, which is mounted for endwise movement in a hole drilled therefor through the spring-carrying lug 9, the arrangement enabling the pin to be retracted just before the attaclnnent of the bar takes place, and to be thereafter advanced through said hole until its inner end almost, but not quite, touches the under side of the spring. The member in question may, if desired, be threaded, in which case its outer end will be enlarged to form a head and the wall of the hole in which it fits will likewise be threaded, all as represented in Fig.

Referring again to the lug 9*, this has a number of functions. For example it protects the spring 13 from possible injury in handling the box. Also it is adapted as to its distance from the spring so that the latter cannot be over-bent when inserting the stylus-bar. This is of importance in itself as well as from a manufacturing standpoint',because it makes it practical to manufacture sound-boxes quantities which will be all alike with substantially uniform stylus-bar tension; and to do this without adjusting the tension in thejiiulividual boxes.

I claim as my invention 2-.-

1. A sound-box, having a pair of spaced supporting parts thereon, one provided with a seat; a spring secured to the other part and having a seat at its free end alining with the first-named seat; and a. stylus bar provided my hand.

L i A w th a pivot pm which is disposed between said supporting parts and has its terminals removably engaged in said seats; the springcarrying part being spaced a short distance from the free end of said spring to prevent the spring from being overbcnt during the engagement and disengagement of said pin.

2. A sound-box, having a stylus bar which is mounted thereon for vibratory movement; said bar having a rigid bearing at one end of its axis of vibration, and a yielding bearing at the other end thereof; and means acting to normally prevent the sec )ml-named bearing from excess yielding.

3. A sound-box, having a stylus bar which is mounted thereon for vibratory movement: said bar having a rigid hearing at one end of its axis of vibration, and a yielding bearing at the other end thereof; and a guard movable into and out of position to prevent the seat; a stylus bar having a transverse pivot;

member whose terminals are removably engaged in said seats; and a member carried by the second-named bearing part for movement endwise into and out of position to prevent said spring from excessyielding, thereby to hold said pivot member in such engagement.

(LA sound-box, having a pair of lugs thereon; a spring carried by one of said lu s; and a stylus bar removably supported intermediate its ends between said spring and the other lug; the spring having its free end normally spaced from its carrier lug, whereby it. is prevented from ovcr-bending during the insertion of the stylus bar.

In testimony whereof I have hereunto set,

nonicu'r HEAD. 

